Triconex Trident - RS-232 Pin-Outs; RS-232 Signal Descriptions

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206 CM Baseplate Connectors

Trident Planning and Installation Guide

RS-232 Pin-Outs

RS-232 Signal Descriptions

Spacing (on or 0) occurs when RS-232 signals are between +6 and +12 V DC;

marking (off or 1) occurs when they are between –6 and –12 V DC. The maximum

cable length is 15 meters (50 feet), but can be extended using modems. The

following table describes the RS-232 signals.

DB-9 Pin Signal Direction RS-232 Function

1 CD In Carrier detect

2 RXD In Receive data

3 TXD Out Transmit data

4 DTR Out Data terminal ready

5 GND — Signal ground

6 DSR — Not used (data set ready)

7 RTS Out Request to send

8 CTS In Clear to send

9 RI — Not used (ring indicator)

Housing Shield — Safety ground

Signal Designator Description

Clear to Send CTS MP ignores CTS and transmits data as soon as it

is available

Request to Send RTS MP turns on RTS unconditionally

Data Carrier Detect DCD MP ignores DCD and always accepts data from

RXD

Transmit Data TXD MP transmits serial data

Receive Data RXD MP receives serial data

Shield